tici

iTrader: (1)

Those days we have 85 - 90 F.
While cruising the LTFT's are +2 / -2, but as soon I drive in traffic or uphill they get low and reach values around -10%.
In the night the LTFT's stay pretty close to 0%.

Is it possible that when the engine bay gets very hot the MAF starts having problems? Or is there any other component that is temperature sensitive?

The IAT shows normal values, both banks have the same LTFT values, so it's not something about injectors of oxygen sensors.
MAP is OK, coolant temperature is between 205 and 220 F (nothing exceptional).

I don't think it's a mechanical problem, because when I let the car cool down for a couple of hours LTFT's get back to normal values (+2 / -2).
It's not limp mode: the actual timing is the same as the high octane values.

Any idea?

Thanks!!

Stefano

camarokid94

iTrader: (2)

i noticed IAT made mine do wierd things!

Jpr5690

iTrader: (13)

iat vs ect bias?

i was reading on the hpt site this can effect your ltft a good deal.... from what i read the iat can get heatsoaked and cause fueling illregularties

SSpdDmon

iTrader: (10)

It was the opposite for my car and both of my friends' cars. As IAT rises, our cars lean out. What does your IAT vs. ECT vs. Airflow table look like?